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HIV functional impairment

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https://www.readbyqxmd.com/read/28639194/rnaa-induced-by-tata-box-targeting-micrornas
#1
Yijun Zhang, Hui Zhang
Recent studies reveal that some nuclear microRNAs (miRNA) and synthesized siRNAs target gene promoters to activate gene transcription (RNAa). Interestingly, our group identified a novel HIV-1-encoded miRNA, miR-H3, which targets specifically the core promoter TATA box of HIV-1 and activates viral gene expression. Depletion of miR-H3 significantly impaired the replication of HIV-1. miR-H3 mimics could activate viruses from CD4(+) T cells isolated from patients receiving suppressive highly active antiretroviral therapy, which is very intriguing for reducing HIV-1 latent reservoir...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28625133/recent-advances-in-targeting-the-hiv-1-tat-tar-complex
#2
Fardokht A Abulwerdi, Stuart F J Le Grice
Following seminal discoveries by Rosen and co-workers in 1985, the HIV-1 TAR has emerged as one of the most extensively studied regulatory elements of the HIV-1 genome. Located adjacent to the long terminal repeat promoter, this cis-acting motif, in conjunction with the viral Tat protein, plays a critical role in viral genomic RNA synthesis via modification of the transcription complex. As such, the Tat/TAR axis has been the subject of intense efforts aimed at developing therapeutic interventions, directed against both the protein and nucleic acid components...
June 15, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28615199/impaired-downregulation-of-nkg2d-ligands-by-nef-protein-from-elite-controllers-sensitizes-hiv-1-infected-cells-to-adcc
#3
Nirmin Alsahafi, Jonathan Richard, Jérémie Prévost, Mathieu Coutu, Nathalie Brassard, Matthew S Parsons, Daniel E Kaufmann, Mark Brockman, Andrés Finzi
HIV-1 Nef clones isolated from a rare subset of HIV-1-infected elite controllers (EC), with the ability to suppress viral load to undetectable levels in the absence of antiretroviral therapy, are unable to fully downregulate CD4 from the plasma membrane of CD4+ T cells. Residual CD4 left at the plasma membrane allows Env-CD4 interaction, which leads to increased exposure of Env CD4-induced epitopes and increases susceptibility of infected cells to antibody-dependent cellular cytotoxicity (ADCC). ADCC is mediated largely by natural killer (NK) cells, which control their activation status through the cumulative signals received through activating and inhibitory receptors...
June 14, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28609401/randomized-controlled-trial-of-caregiver-training-for-hiv-infected-child-neurodevelopment-and-caregiver-well-being
#4
Judith K Bass, Robert Opoka, Itziar Familiar, Noeline Nakasujja, Alla Sikorskii, Jorem Awadu, Deborah Givon, Cilly Shohet, Sarah M Murray, Jura Augustinavicius, Tamar Mendelson, Michael Boivin
OBJECTIVES: HIV infection places children at neurodevelopmental risk; for young children in poverty, risk is compounded by compromised caregiving quality. The Mediational Intervention for Sensitizing Caregivers (MISC) program trained caregivers on fostering daily interactions with young children. We hypothesized that MISC could (1) enhance neurodevelopment of rural Ugandan HIV-infected children and (2) improve mental health outcomes of their caregivers, which might mediate improved caregiving quality...
June 12, 2017: AIDS
https://www.readbyqxmd.com/read/28602461/adapting-systems-of-care-for-people-aging-with-hiv
#5
Eugenia L Siegler, Mark Brennan-Ing
People aging with HIV have medical and psychosocial needs that require more than the HIV services network can provide. HIV providers may lack experience managing multimorbidity or the functional consequences of aging. Social support services may be unable to provide necessary services for people living with HIV (PLWH) who are becoming increasingly frail or facing cognitive impairment. HIV providers will be caring for aging PLWH whose HIV management may seem simple compared with the significant burdens of stigma, mental health needs, social isolation, multimorbidity, and aging-related syndromes...
May 26, 2017: Journal of the Association of Nurses in AIDS Care: JANAC
https://www.readbyqxmd.com/read/28598903/self-reported-difficulties-with-everyday-function-cognitive-symptoms-and-cognitive-function-in-people-with-hiv
#6
Rosanna Laverick, Lewis Haddow, Marina Daskalopoulou, Fiona Lampe, Richard Gilson, Andrew Speakman, Andrea Antinori, Tina Bruun, Anna Vassilenko, Simon Collins, Alison Rodger
BACKGROUND: We determined factors associated with self-reported decline in activities of daily living (ADLs) and symptoms of cognitive impairment in HIV positive (HIV+) adults in five European clinics. METHODS: HIV+ adults underwent computerized and pen-and-paper neuropsychological tests and questionnaires of cognitive symptoms and ADLs. We considered cognitive function in five domains, psychosocial factors and clinical parameters as potentially associated with symptoms...
June 7, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28596187/functional-connectivity-in-virally-suppressed-patients-with-hiv-associated-neurocognitive-disorder-a-resting-state-analysis
#7
J R Chaganti, A Heinecke, T M Gates, K J Moffat, B J Brew
BACKGROUND AND PURPOSE: HIV-associated neurocognitive disorder still occurs despite virally suppressive combination antiretroviral therapy. In the pre-combination antiretroviral era and in patients without HIV suppression, HIV-associated neurocognitive disorder was caused by synaptodendritic injury resulting in impairment of neural networks, characterized by decreased attention, psychomotor slowing, and working memory deficits. Whether similar pathogenesis is true for HIV-associated neurocognitive disorder in the context of viral suppression is not clear...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28592814/impairment-of-the-activin-a-autocrine-loop-by-lopinavir-reduces-self-renewal-of-distinct-human-adipose-progenitors
#8
Christophe Ravaud, Martin Paré, Stéphane Azoulay, Christian Dani, Annie Ladoux
Maintenance of the adipose tissue requires a proper balance between self-renewal and differentiation of adipose progenitors (AP). Any deregulation leads either to fat overexpansion and obesity or fat loss and consequent lipodystrophies. Depending on the fat pad location, APs and adipocytes are heterogeneous. However, information on the pharmacological sensitivity of distinct APs to drugs known to alter the function of adipose tissue, especially HIV protease inhibitors (PIs) is scant. Here we show that PIs decreased proliferation and clonal expansion of APs, modifying their self-renewal potential...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28590332/hiv-positive-youth-who-are-perinatally-infected-have-impaired-endothelial-function
#9
Sahera Dirajlal-Fargo, Abdus Sattar, Manjusha Kulkarni, Emily Bowman, Nicholas Funderburg, Grace A Mccomsey
OBJECTIVE: Evaluating cardiovascular (CVD) risk in children and youth 13-24 years old who are facing a life time exposure to both HIV and antiretroviral therapy (ART) is a research priority. This study compares endothelial function measured by Peripheral Arterial Tonometry in HIV+ youth infected perinatally and behaviorally as well as HIV- controls. METHODS: Three groups of participants aged 8-30 yo were enrolled; HIV+ perinatally-infected, HIV+ behaviorally-infected on ART with HIV-1 RNA <1,000 copies/mL, and HIV- controls...
June 5, 2017: AIDS
https://www.readbyqxmd.com/read/28590329/antiretroviral-initiation-is-associated-with-increased-skeletal-muscle-area-and-fat-content
#10
Kristine M Erlandson, Suzanne Fiorillo, Fadzai Masawi, Ann Scherzinger, Grace A McComsey, Jordan E Lake, James H Stein, Judith S Currier, Todd T Brown
OBJECTIVE: A greater burden of physical function impairment occurs in HIV-infected adults; the impact of antiretroviral therapy (ART) initiation on muscle density (less dense = more fat), a measure of muscle quality, is unknown. DESIGN: AIDS Clinical Trials Group Study A5260 s, a cardiometabolic substudy of A5257, randomized HIV-infected, ART-naïve adults to ritonavir-boosted atazanavir, darunavir, or raltegravir with tenofovir/emtricitabine backbone. Single-slice abdominal computed tomography (CT) scans from baseline and week 96 were reanalyzed for lean muscle area and density...
June 5, 2017: AIDS
https://www.readbyqxmd.com/read/28580181/intercellular-adhesion-molecular-5-as-marker-in-hiv-associated-neurocognitive-disorder
#11
Lin Yuan, Feili Wei, Xin Zhang, Xianghua Guo, Xiaofan Lu, Bin Su, Tong Zhang, Hao Wu, Dexi Chen
Despite the use of antiretroviral drugs HIV associated neurocognitive disorders (HAND) are still common in HIV-seropositive patients. Identification of HIV patients with cognitive impairment in early-stage might benefit a great deal from disease progression monitoring and treatment adjustment. Intercellular adhesion molecule-5 (ICAM5), characteristically expressed on neuron, may suppress immune functions by inhibition of T cell activation in central nervous system. Previous studies have shown that ICAM5 could be detected in patients with brain injury...
May 2017: Aging and Disease
https://www.readbyqxmd.com/read/28576330/first-report-of-two-cases-of-cryptococcosis-in-tripoli-libya-infected-with-cryptococcus-neoformans-isolates-present-in-the-urban-area
#12
M S Ellabib, Z A Krema, A A Allafi, M Cogliati
Cryptococcosis is a potentially fatal fungal disease caused by the basidiomycetes yeasts Cryptococcus neoformans and C. gattii with high predilection to invade the central nervous system mainly in immunocompromised hosts. Skin can be secondarily involved in disseminated infection or be exceptionally involved as primary cutaneous infection by inoculation with contaminated materials. We report the first two Libyan cases of cryptococcal meningitis in HIV patients, in which one of them presented a secondary cutaneous involvement due to systemic dissemination...
May 30, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28575231/everyday-multitasking-abilities-in-older-hiv-adults-neurobehavioral-correlates-and-the-mediating-role-of-metacognition
#13
P L Fazeli, K B Casaletto, S P Woods, A Umlauf, J C Scott, D J Moore
Objective: The prevalence of older adults living with HIV is rising, as is their risk for everyday functioning problems associated with neurocognitive dysfunction. Multitasking, the ability to maintain and carry out subgoals in support of a larger goal, is a multidimensional skill ubiquitous during most real-life tasks and associated with prefrontal networks that are vulnerable in HIV. Understanding factors associated with multitasking will improve characterization of HIV-associated neurocognitive disorders...
May 31, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28574961/modifications-in-acute-phase-and-complement-systems-predict-shifts-in-cognitive-status-of-hiv-infected-patients
#14
Ceereena Ubaida-Mohien, Benjamin Lamberty, Alex M Dickens, Michelle M Mielke, Thomas Marcotte, Ned Sacktor, Igor Grant, Scott Letendre, Donald Franklin, Pawel Cibrowski, Ravi Tharakan, Justin C McArthur, Howard Fox, Norman J Haughey
BACKGROUND: The prevalence of HIV-associated neurocognitive disorders (HAND) has not changed considerably in the last two decades. Potent antiretroviral therapy has shifted the severity of HAND to milder phenotypes, but excess morbidity and mortality continue to be associated with HAND. Changes in numerous markers of immune function, inflammation, and cellular stress have been repeatedly associated with HAND, but the underlying systems that drive these changes have not been identified...
June 19, 2017: AIDS
https://www.readbyqxmd.com/read/28569776/hiv-integrase-inhibitor-elvitegravir-impairs-rag-functions-and-inhibits-v-d-j-recombination
#15
Mayilaadumveettil Nishana, Namrata M Nilavar, Rupa Kumari, Monica Pandey, Sathees C Raghavan
Integrase inhibitors are a class of antiretroviral drugs used for the treatment of AIDS that target HIV integrase, an enzyme responsible for integration of viral cDNA into host genome. RAG1, a critical enzyme involved in V(D)J recombination exhibits structural similarity to HIV integrase. We find that two integrase inhibitors, Raltegravir and Elvitegravir, interfered with the physiological functions of RAGs such as binding, cleavage and hairpin formation at the recombination signal sequence (RSS), though the effect of Raltegravir was limited...
June 1, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28550120/hiv-1-decreases-nrf2-are-activity-and-phagocytic-function-in-alveolar-macrophages
#16
Bashar S Staitieh, Lingmei Ding, Wendy A Neveu, Paul Spearman, David M Guidot, Xian Fan
Respiratory complications occur frequently in individuals living with human immunodeficiency-1 virus (HIV) infection, and there is evidence that HIV-related oxidative stress impairs alveolar macrophage immune function. We hypothesized that nuclear factor (erythroid-derived 2)-like 2 (Nrf2), a master transcription factor that activates the antioxidant response element (ARE) and regulates antioxidant defenses, has an important role in alveolar macrophage (AMs) immune dysfunction in individuals with HIV infections...
May 26, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28549840/phosphatidylinositol-4-5-bisphosphate-mediated-pathophysiological-effect-of-hiv-1-tat-protein
#17
REVIEW
Bruno Beaumelle, Petra Tóth, Olfat A Malak, Christophe Chopard, Gildas Loussouarn, Nicolas Vitale
Human immunodeficiency virus (HIV)-infected cells actively release the transcriptional activator (Tat) viral protein that is required for efficient HIV gene transcription. Extracellular Tat is able to enter uninfected cells. We recently reported that internalized Tat escapes endosomes to reach the cytosol and is then recruited to the plasma membrane by phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2). As a consequence, Tat strongly impairs different critical cellular functions in several cell types. Here we will review recent evidences showing that Tat, by affecting the interaction of key cellular effectors with PtdIns(4,5)P2, blocks exocytosis from neuroendocrine cells, perturbs the synaptic vesicle exo-endocytosis cycle, prevents efficient phagocytosis by macrophages, and alters potassium channel activity in cardiac cells...
May 23, 2017: Biochimie
https://www.readbyqxmd.com/read/28549526/mobile-phone-ecological-momentary-assessment-of-daily-stressors-among-people-living-with-hiv-elucidating-factors-underlying-health-related-challenges-in-daily-routines
#18
Shu Farmer, Deborah Mindry, W Scott Comulada, Dallas Swendeman
Stressful life events and daily hassles affect people living with HIV (PLWH). However, capturing stress-related events and cognitive impairment is often plagued with recall biases. Incorporating reliable information technology, such as mobile phones, can be a resourceful method for measuring health behaviors (MHB). We report findings from an MHB pilot study with 32 African American, Latino/Hispanic, and White PLWH from Los Angeles. Participants reported perceived stressors in their daily routines using a smartphone Ecological Momentary Assessment (EMA) application...
April 12, 2017: Journal of the Association of Nurses in AIDS Care: JANAC
https://www.readbyqxmd.com/read/28544005/hiv-1-p55-gag-protein-induces-senescence-of-human-bone-marrow-mesenchymal-stem-cells-and-reduces-their-capacity-to-support-expansion-of-hematopoietic-stem-cells-in-vitro
#19
Ya-Hong Yuan, Shan-Shan Zhao, Xiao-Li Wang, Zhi-Ping Teng, Dong-Sheng Li, Yi Zeng
Patients with human immunodeficiency virus-1 (HIV-1) infection often present with hematopoietic failure. As the important hematopoietic support cells in the bone marrow (BM), the bone marrow mesenchymal stem cells (BMSCs) can be impacted by HIV proteins that are released by infected cells within BM. In this study, we tested whether HIV protein p55-gag could induce senescence of BMSCs and reduce their capacity to support expansion of hematopoietic stem cells in vitro. BMSCs were chronically treated with p55-gag (BMSCgag ) for up to 20 days, and their proliferative activity and senescence makers were compared to nontreated cells (BMSCcon )...
May 25, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28540990/change-in-renal-function-among-hiv-infected-koreans-receiving-tenofovir-disoproxil-fumarate-backbone-antiretroviral-therapy-a-3-year-follow-up-study
#20
Kyoung Hwa Lee, Ji Un Lee, Nam Su Ku, Su Jin Jeong, Sang Hoon Han, Jun Yong Choi, Young Goo Song, June Myung Kim
PURPOSE: Tenofovir disoproxil fumarate (TDF) is commonly prescribed as a fixed-dose, co-formulated antiretroviral drug for HIV-1 infection. The major concern of long-term TDF use is renal dysfunction. However, little is known about the long-term patterns of changes in renal function in HIV-infected Koreans receiving TDF. MATERIALS AND METHODS: We prospectively followed 50 HIV-infected Koreans, performing laboratory tests every 3 months during the first year and every 6 months for the next 2 years...
July 2017: Yonsei Medical Journal
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